diff -r 43e37759235e -r 51a74ef9ed63 Symbian3/SDK/Source/GUID-4D5B0B16-329F-5932-995D-DB43E6641EF9.dita
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-4D5B0B16-329F-5932-995D-DB43E6641EF9.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-4D5B0B16-329F-5932-995D-DB43E6641EF9" xml:lang="en"><title>UID
+manipulation classes</title><shortdesc>Describes the classes that provide the mechanism for manipulating
+UIDs in programs.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>A UID is a globally unique identifier consisting of a 32-bit number. Symbian
+platform makes extensive use of UIDs to provide lightweight identification
+of file types.</p>
+<p>To guarantee uniqueness, all UIDs are assigned to developers centrally
+by Symbian. For testing and development, a well known range of public UIDs
+can be used, but these must not be used for general release. To generate UIDs
+for use in programs, developers must contact Symbian. </p>
+<p>The <codeph>TUid</codeph>, <codeph>TUidType</codeph> and <codeph>TCheckedUid</codeph> classes
+provide the mechanism for creating and manipulating (e.g. comparing) UIDs
+within programs.</p>
+</conbody></concept>
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